Hi everyone tonight:
My experiences with poplar is as follows:
This is the specie that grows here in Ontario, it never was widely used as lumber even timbers twist and the lumber will also twist. I expect that it is the water content that causes the movement.
Right now as the other valuable species disappear once in a while a poplar log finds its way to the sawmill
It becomes very hard when dry and resists nailing, and does not resist rotting well.
NH